broken package indexes of hoary-security/universe and hoary/universe

[zwz]

I started to experience this problem this morning.
# aptitude update
Reading package lists... Done
Building dependency tree
Reading extended state information
Initializing package states... Done
Get:1 http://security.ubuntu.com hoary-security Release.gpg [189B]
Hit http://security.ubuntu.com hoary-security Release
Hit http://security.ubuntu.com hoary-security/main Packages
Hit http://security.ubuntu.com hoary-security/restricted Packages
Hit http://security.ubuntu.com hoary-security/main Sources
Hit http://security.ubuntu.com hoary-security/restricted Sources
Ign http://security.ubuntu.com hoary-security/universe Packages
Hit http://security.ubuntu.com hoary-security/universe Sources
Hit http://security.ubuntu.com hoary-security/multiverse Packages
Hit http://security.ubuntu.com hoary-security/multiverse Sources
Get:2 http://security.ubuntu.com hoary-security/universe Packages [27.2kB]
99% [2 Packages gzip 0] [Connecting to cn.archive.ubuntu.com (82.211.81.151)]
gzip: stdin: not in gzip format
Err http://security.ubuntu.com hoary-security/universe Packages
Sub-process gzip returned an error code (1)
Get:3 http://cn.archive.ubuntu.com hoary Release.gpg [189B]
Get:4 http://cn.archive.ubuntu.com hoary-updates Release.gpg [189B]
Hit http://cn.archive.ubuntu.com hoary Release
Hit http://cn.archive.ubuntu.com hoary-updates Release
Hit http://cn.archive.ubuntu.com hoary/main Packages
Hit http://cn.archive.ubuntu.com hoary/restricted Packages
Hit http://cn.archive.ubuntu.com hoary/main Sources
Hit http://cn.archive.ubuntu.com hoary/restricted Sources
Ign http://cn.archive.ubuntu.com hoary/universe Packages
Ign http://cn.archive.ubuntu.com hoary/universe Sources
Hit http://cn.archive.ubuntu.com hoary/multiverse Packages
Hit http://cn.archive.ubuntu.com hoary/multiverse Sources
Hit http://cn.archive.ubuntu.com hoary-updates/main Packages
Hit http://cn.archive.ubuntu.com hoary-updates/restricted Packages
Hit http://cn.archive.ubuntu.com hoary-updates/main Sources
Hit http://cn.archive.ubuntu.com hoary-updates/restricted Sources
Get:5 http://cn.archive.ubuntu.com hoary/universe Packages [2853kB]
99% [Working]
gzip: stdin: not in gzip format
Err http://cn.archive.ubuntu.com hoary/universe Packages
Sub-process gzip returned an error code (1)
Get:6 http://cn.archive.ubuntu.com hoary/universe Sources [1142kB]
99% [Working]
gzip: stdin: not in gzip format
Err http://cn.archive.ubuntu.com hoary/universe Sources
Sub-process gzip returned an error code (1)
Fetched 6B in 1m17s (0B/s)
Reading package lists... Done
Building dependency tree
Reading extended state information
Initializing package states... Done

[zwz]

It turned out to be the infamous content-filtering Great Firewall of my country which broke the downloads of the package indexes. Sorry for the noise.